메타데이터
| 항목 |
값 |
| Designation |
207P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-01-31T21:10:31.765440Z |
| Orbit solution date (soln_date, UTC) |
2024-07-13T19:12:21Z |
| Obs used |
945 |
| NEO |
Yes |
| M1 |
18.100 |
| K1 |
7.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-09-21.0000000 |
| e |
0.75913663 |
| q (au) |
0.932526 |
| a (au) |
3.871595 |
| i (deg) |
10.186368 |
| Ω (om, deg) |
198.342590 |
| ω (w, deg) |
272.996482 |
| M (ma, deg) |
248.359775 |
밝기
산란 + 전체 선형
$$
M_a = (17.808 + 4.847\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.808 |
| n |
4.847 |
| gf |
1.000 |
| gb |
-0.660 |
| k |
0.889 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-08-14 |
2023-11-08 |
-7.5803 |
+2.112 |
| 2023-11-08 |
2023-11-27 |
+6.0478 |
-0.368 |
| 2023-11-27 |
2024-01-31 |
+9.0520 |
-0.573 |
| 2024-02-01 |
2024-03-24 |
-1.1469 |
+0.236 |
| 2024-03-24 |
2024-05-03 |
-7.4646 |
+0.253 |
| 2024-05-03 |
2024-05-29 |
+14.8588 |
-4.201 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
18:49:59.19 |
-13:08:48.8 |
HIP 92498 |
23.80 |
| 2026-03-26 12:00 |
18:50:05.50 |
-13:07:48.7 |
HIP 92498 |
23.63 |
| 2026-03-27 00:00 |
18:50:11.64 |
-13:06:48.7 |
HIP 92498 |
23.62 |
| 2026-03-27 12:00 |
18:50:17.62 |
-13:05:48.7 |
HIP 92498 |
23.76 |
| 2026-03-28 00:00 |
18:50:23.44 |
-13:04:48.7 |
HIP 92498 |
24.04 |
| 2026-03-28 12:00 |
18:50:29.10 |
-13:03:48.8 |
HIP 92498 |
24.46 |
| 2026-03-29 00:00 |
18:50:34.59 |
-13:02:49.0 |
HIP 92498 |
25.00 |
| 2026-03-29 12:00 |
18:50:39.92 |
-13:01:49.2 |
HIP 92498 |
25.64 |
| 2026-03-30 00:00 |
18:50:45.08 |
-13:00:49.4 |
HIP 92498 |
26.37 |
| 2026-03-30 12:00 |
18:50:50.08 |
-12:59:49.8 |
HIP 92498 |
27.19 |
| 2026-03-31 00:00 |
18:50:54.91 |
-12:58:50.1 |
HIP 92498 |
28.06 |
| 2026-03-31 12:00 |
18:50:59.58 |
-12:57:50.6 |
HIP 92498 |
29.00 |
| 2026-04-01 00:00 |
18:51:04.08 |
-12:56:51.1 |
HIP 92498 |
29.98 |
| 2026-04-01 12:00 |
18:51:08.42 |
-12:55:51.7 |
HIP 92498 |
30.99 |
| 2026-04-02 00:00 |
18:51:12.58 |
-12:54:52.4 |
HIP 92498 |
32.04 |
| 2026-04-02 12:00 |
18:51:16.58 |
-12:53:53.2 |
HIP 92498 |
33.10 |
| 2026-04-03 00:00 |
18:51:20.41 |
-12:52:54.1 |
HIP 92498 |
34.19 |
| 2026-04-03 12:00 |
18:51:24.08 |
-12:51:55.1 |
HIP 92642 |
35.16 |
| 2026-04-04 00:00 |
18:51:27.57 |
-12:50:56.1 |
HIP 92642 |
33.88 |
| 2026-04-04 12:00 |
18:51:30.89 |
-12:49:57.3 |
HIP 92642 |
32.63 |
| 2026-04-05 00:00 |
18:51:34.04 |
-12:48:58.6 |
HIP 92642 |
31.40 |
| 2026-04-05 12:00 |
18:51:37.03 |
-12:48:00.0 |
HIP 92642 |
30.19 |
| 2026-04-06 00:00 |
18:51:39.84 |
-12:47:01.5 |
HIP 92642 |
29.01 |
| 2026-04-06 12:00 |
18:51:42.48 |
-12:46:03.1 |
HIP 92642 |
27.85 |
| 2026-04-07 00:00 |
18:51:44.95 |
-12:45:04.9 |
HIP 92642 |
26.71 |
| 2026-04-07 12:00 |
18:51:47.24 |
-12:44:06.8 |
HIP 92642 |
25.59 |
| 2026-04-08 00:00 |
18:51:49.36 |
-12:43:08.8 |
HIP 92642 |
24.49 |
| 2026-04-08 12:00 |
18:51:51.31 |
-12:42:11.0 |
HIP 92642 |
23.42 |
| 2026-04-09 00:00 |
18:51:53.09 |
-12:41:13.3 |
HIP 92642 |
22.37 |
| 2026-04-09 12:00 |
18:51:54.69 |
-12:40:15.8 |
HIP 92642 |
21.34 |
| 2026-04-10 00:00 |
18:51:56.11 |
-12:39:18.4 |
HIP 92642 |
20.33 |
| 2026-04-10 12:00 |
18:51:57.36 |
-12:38:21.2 |
HIP 92642 |
19.35 |
| 2026-04-11 00:00 |
18:51:58.44 |
-12:37:24.1 |
HIP 92642 |
18.40 |
| 2026-04-11 12:00 |
18:51:59.33 |
-12:36:27.2 |
HIP 92642 |
17.47 |
| 2026-04-12 00:00 |
18:52:00.06 |
-12:35:30.5 |
HIP 92642 |
16.58 |
| 2026-04-12 12:00 |
18:52:00.60 |
-12:34:34.0 |
HIP 92642 |
15.72 |
| 2026-04-13 00:00 |
18:52:00.97 |
-12:33:37.6 |
HIP 92642 |
14.89 |
| 2026-04-13 12:00 |
18:52:01.16 |
-12:32:41.5 |
HIP 92642 |
14.12 |
| 2026-04-14 00:00 |
18:52:01.18 |
-12:31:45.5 |
HIP 92642 |
13.39 |
| 2026-04-14 12:00 |
18:52:01.01 |
-12:30:49.7 |
HIP 92642 |
12.72 |
| 2026-04-15 00:00 |
18:52:00.67 |
-12:29:54.2 |
HIP 92642 |
12.12 |
| 2026-04-15 12:00 |
18:52:00.15 |
-12:28:58.8 |
HIP 92642 |
11.60 |
| 2026-04-16 00:00 |
18:51:59.45 |
-12:28:03.7 |
HIP 92642 |
11.17 |